The fire broke out in the 360-square-foot trailer, which is used as a small office, storage area and computer center to run asphalt operations in the quarry, sometime around 10:30 p.m. Saturday, according to Dublin Fire Co. Chief Philip Meyers.

Meyers reported the fire was under control within 40 minutes but fire fighters remained with the smoldering debris until around 2 a.m. Sunday.

Four insulated tanks containing tar were involved in the fire but only exterior insulation was burned.

"There was no rupture to the tanks and no tar was lost," he said.

John Kibblehouse, a principal in the company, said yesterday the loss of the computer, used for mix designs in the production of various types of asphalt road material, would force the closing of asphalt operations at the site for two to four weeks.

Employees will shift into quarry duties until the plant re-opens, he said.

Kibblehouse indicated damage estimates to the computer area and tanks, while preliminary, are around $150,000.

The Skippack-based supplier of road materials began spring operations about three weeks ago. Kibblehouse said the company would meet the needs of contractors to which they are obliged to provide asphalt through their quarry in Bechtelsville.

The cause of the fire, unknown as of yesterday, is being investigated by the Bucks County Fire Marshall.

Also responding the two-alarm fire was the Silverdale Fire Company, which used additional tankers provided by the Sellersville, Telford, Plumsteadville and Ottsville Fire companies and engines from the Souderton and Perkasie companies.